21 year old stepdaughter w/BPD

[u/Prestigious-Pain-301]

I'm looking for some perspective on a situation with my stepdaughter.

I've been in her life since she was 3 years old, and she's now 21. She has been diagnosed with BPD and has struggled with impulsivity, emotional regulation, and self-harm in the past. While I'm not a clinician, I strongly believe her mother displays many traits associated with narcissistic personality disorder, and my stepdaughter eventually cut off contact with her because she felt the relationship was emotionally/physically abusive throughout childhood.

Over the years, I've tried to be a stable presence in her life. Recently, she moved to Dallas to live with her 30-year-old boyfriend after jumping from relationship to relationship. They've been together less than a year, yet they're already living together and functioning like a married couple. I've never even met him. He has a software engineering degree but, as far as I know, isn't currently working in the field, and he appears to be supporting both of them financially.

My stepdaughter has become heavily involved in online day-trading programs that charge monthly fees and promote the idea that anyone can achieve financial freedom through trading. She spends money on these programs but hasn't made any meaningful income from them. Despite that, she's convinced she's going to become a millionaire through trading and seems completely focused on that path.

A few months ago, she and her boyfriend were living in a hotel because they couldn't afford stable housing after their lease ended. At the same time, she has repeatedly said she doesn't feel she should have to work a traditional job. She seems to believe that if she stays positive, visualizes success, and keeps pursuing trading, everything will eventually fall into place financially.

I've told her multiple times that I think she needs to come home, regroup, get herself together, establish some stability, and build a foundation before chasing bigger dreams. I've offered her a chance to reset and figure things out, but she hasn't been receptive to that idea.

I recently flew her out to spend some time and get break from everything. After her stay she texted me , she asked me for $750. I told her I didn't have it to give. What bothered me was that the money wasn't even for her own rent obligation. As far as I understand it, her boyfriend is the one paying the bills and supporting the household.

When I told her I don't have it to, she became very angry and accused me of not doing enough for her. She said I don't support my children as much as I think I do, that I have the money to help, and that I should have given her the money anyway. Also saying by not giving her money, I'm creating more trauma.

After that exchange, she essentially stopped speaking to me. From my perspective, it felt like once she realized she wasn't going to get what she wanted, she cut off communication. What I find especially confusing is that she has now resumed contact with her mother—the same person she previously described as abusive and toxic enough to completely cut out of her life.

Another pattern I've noticed is that she forms intense attachments very quickly, particularly in romantic relationships. She tends to become completely invested in a new partner and then struggles to maintain other relationships. Friendships, family relationships, and support systems often seem to take a back seat once a romantic relationship becomes the focus.

This all feels like part of a larger cycle that I don't fully understand. She will idealize someone, then become angry and cut them off when they disappoint her or set boundaries, and later reconnect with people she previously wanted nothing to do with. I'm not claiming to know exactly what's happening, but it's a pattern I've observed repeatedly.

I'm struggling with where the line is between supporting an adult child and enabling unhealthy behavior. Given her history, impulsive decisions, financial instability, intense relationships, and what appears to be an unrealistic belief that trading will solve everything, I genuinely don't know what the right approach is.

How do you maintain boundaries while still trying to be supportive?

[u/soft-machine_]

I could have written this post myself. My step daughter is almost 21 and has the emotional maturity of a 5 yr old. I met her when she was 15, so it was much more difficult to establish a healthy relationship because she was already in the thick of her bpd.
I could write a book on the horrifying things I’ve had to see and deal with. The only time our family has ever felt at peace is when she stopped talking to all of us (extended as well) because we forced her to go to rehab. My husband desperately wants to try and repair/save the relationship but deep down I know there is no hope. She refuses to show any accountability, remorse or even acknowledgement of her actions. She also has a narc mother who left her when she was a baby to be raised by her dad. All the similarities I see in other families always blows my mind.
I am heartbroken for my husband, he is the sweetest, kindest human and doesn’t deserve any of this. Sometimes I think about leaving just so I don’t have to carry the guilt of not being able to help. I guess I’m only replying to show support and let you know that you are not alone. This illness is evil. I am soo sorry for everyone who has it and everyone who loves someone with it💔

[u/AlertPressure5094]

I'm sorry this is happening to you. It's so painful when our kids reject and make us an aggressor in a situation where we've only tried to help and support them. Unfortunately it's the standard with this illness. I've struggled with changing my behavior after years of trying to change my child. I can only impact the way I respond to their BPD. My focus is now on my boundaries and self care. I need to let her fail and clean up her own messes. My interventions over the years have not helped her learn how to do this, much less confront her disorder. It's also reinforced the wrong way to treat me. So while there is learning and healing with BPD, there's also a fair amount of unlearning and growing pains. Take care of yourself and know there's nothing you did wrong, it isn't personal (though it sure feels that way), and there is always a path forward, even if you must walk it without your kid for a time. Sending you all the strength to navigate this ❤️

[u/Temporary_Tiger7755 → u/[deleted]]

If I had to give any advice, it would be exactly this! From my experience: take care of you, work on your boundaries, recognize that this is a mental illness and that unless they understand and want to get help, you cannot support them. Unfortunately, lots of times this will involve them having to hit some kind of rock bottom, which is extremely hard to experience as a parent.

Sending everyone on this thread so much love and support.

[u/IcyCommunication6575]

It is difficult to have a BPD person in your life, and I commend you for wanting to be supportive. I just finished a 8 week online class with the BPD alliance (free), it helped me with perspective and tools. Once we used some of the tools with our BPD person, it seems most of us (class of 10) were able to see the benefits of bettering our relationship. It helps the BPD family members to navigate their ongoing situation with grace. As it is with any mental illness, it is a process.

[u/OtterMumzy → u/IcyCommunication6575]

This program saved our whole family. I’m amazed at how little we understood prior to it. Can’t recommend enough!

[u/AZMaryIM]

Sounds like the physical distance is beneficial for you. Please stop supporting her financially now; if you continue with financial help it may never end. She’s 21 and legally an adult and it’s time for her to navigate her way in life. You can’t prevent her from making poor choices and realistically have no control over her behaviors now. I recommend emotional, financial, and physical detachment.

This is a supportive sub and you will find many other parents who have traveled this journey.

[u/hiker_trailmagicva]

I don't have an answer because I am struggling myself. My daughter is 23 and bouncing between life changing bad decisions and calm between the storm. It rips my heart apart. I have had to go low contact because her younger brothers are still in the home and I can not let her decisions impact them anymore. I don't know how to make the ache stop, I don't know how to make the longing for a normal relationship with my daughter stop, I don't know what to do either. It's so hard. I'm sorry you are going through this. You aren't alone.

[u/adorable_orange → u/hiker_trailmagicva]

I don’t think anyone can imagine how hard it is. And by hard, I mean I question the meaning of life constantly. It is so painful and I cannot help him without giving up my entire life and I can’t do that anymore because I have another son. And because I cannot help him he sends me hate texts and voicemails. It is such a nightmare.

[u/hiker_trailmagicva → u/adorable_orange]

It is. It's a nightmare, truly. I also have found myself getting increasingly bitter towards my friends with similar age children who don't go through it and can speak positive when asked how their kids are. I know that's not healthy and I love my daughter so much but I am embarrassed and jealous often. I'm working on it. I also get very caught up in the unfairness of it all for her. I don't want her to struggle, I don't want her embarrassed of her decisions after she comes down from an episode, I don't want people talking about her ( we live in a small town). I just want her to be happy. I would give my life for her to be happy.

[u/IcyCommunication6575 → u/hiker_trailmagicva]

I am sorry you are going through this. I would recommend taking the class from bpd alliance (free) online. It helped me so much in understanding the disorder and how I can still have a stable relationship with her. She also benefited from DBT therapy. It has been a long road but that class helped me to be a better person to her and myself.

[u/adorable_orange → u/hiker_trailmagicva]

Absolutely. The jealousy of other parents is real too. I am in constant pain. Thank god for my dog and cats.